Food Network and Betty Crocker have simple and easy-to-follow recipes for slow-cooker apple butter. Food Network's recipe uses Granny Smith apples, while Betty Crocker's uses Gala apples.
To make Food Network's recipe, peel, core, and cut 3 pounds of Granny Smith apples into small pieces. Place the apples, along with 2 50-ounce jars unsweetened applesauce, 4 cups sugar, 1 1/2 cups apple juice, 2 teaspoons ground cinnamon, 1 teaspoon ground cloves and 1 teaspoon ground allspice into a slow cooker. Stir, and cover. Cook for eight to 10 hours on low. Remove the cover, and taste for seasoning. Adjust sesonings to your liking, and continue cooking until the liquid and mixture are reduced. The apple butter can be stored in sterilized jars.
To make Betty Crocker's recipe, peel, core, and cut 5 pounds Gala apples into small pieces. Grate the apples, and place in a slow cooker, along with 1 cup packed light brown sugar, 1/2 teaspoon salt and 1 cinnamon stick. Cover, and cook for four hours on high. Pour the mixture into a food processor, and remove the cinnamon stick. Puree until smooth, and return to the slow cooker. Add the cinnamon stick. Cook uncovered for four hours on high. Discard the cinnamon stick, and store in jars.